package com.cmeduSystem.webadmin.app.service.impl;

import cn.hutool.core.collection.CollUtil;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.cmeduSystem.webadmin.app.service.*;
import com.cmeduSystem.webadmin.app.dao.*;
import com.cmeduSystem.webadmin.app.model.*;
import com.cmeduSystem.common.core.base.dao.BaseDaoMapper;
import com.cmeduSystem.common.core.object.TokenData;
import com.cmeduSystem.common.core.object.MyRelationParam;
import com.cmeduSystem.common.core.base.service.BaseService;
import com.cmeduSystem.common.sequence.wrapper.IdGeneratorWrapper;
import com.github.pagehelper.Page;
import lombok.extern.slf4j.Slf4j;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.*;

/**
 * 客户管理数据操作服务类。
 *
 * @author xulei
 * @date 2025-09-04
 */
@Slf4j
@Service("customerService")
public class CustomerServiceImpl extends BaseService<Customer, Long> implements CustomerService {

    @Autowired
    private IdGeneratorWrapper idGenerator;
    @Autowired
    private CustomerMapper customerMapper;

    /**
     * 返回当前Service的主表Mapper对象。
     *
     * @return 主表Mapper对象。
     */
    @Override
    protected BaseDaoMapper<Customer> mapper() {
        return customerMapper;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public Customer saveNew(Customer customer) {
        customerMapper.insert(this.buildDefaultValue(customer));
        return customer;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void saveNewBatch(List<Customer> customerList) {
        if (CollUtil.isNotEmpty(customerList)) {
            customerList.forEach(this::buildDefaultValue);
            customerMapper.insertList(customerList);
        }
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public boolean update(Customer customer, Customer originalCustomer) {
        customer.setCreateUserId(originalCustomer.getCreateUserId());
        customer.setUpdateUserId(TokenData.takeFromRequest().getUserId());
        customer.setCreateTime(originalCustomer.getCreateTime());
        customer.setUpdateTime(new Date());
        // 这里重点提示，在执行主表数据更新之前，如果有哪些字段不支持修改操作，请用原有数据对象字段替换当前数据字段。
        UpdateWrapper<Customer> uw = this.createUpdateQueryForNullValue(customer, customer.getId());
        return customerMapper.update(customer, uw) == 1;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public boolean remove(Long id) {
        return customerMapper.deleteById(id) == 1;
    }

    @Override
    public List<Customer> getCustomerList(Customer filter, String orderBy) {
        return customerMapper.getCustomerList(filter, orderBy);
    }

    @Override
    public List<Customer> getCustomerListWithRelation(Customer filter, String orderBy) {
        List<Customer> resultList = customerMapper.getCustomerList(filter, orderBy);
        // 在缺省生成的代码中，如果查询结果resultList不是Page对象，说明没有分页，那么就很可能是数据导出接口调用了当前方法。
        // 为了避免一次性的大量数据关联，规避因此而造成的系统运行性能冲击，这里手动进行了分批次读取，开发者可按需修改该值。
        int batchSize = resultList instanceof Page ? 0 : 1000;
        this.buildRelationForDataList(resultList, MyRelationParam.normal(), batchSize);
        return resultList;
    }

    private Customer buildDefaultValue(Customer customer) {
        if (customer.getId() == null) {
            customer.setId(idGenerator.nextLongId());
        }
        TokenData tokenData = TokenData.takeFromRequest();
        customer.setCreateUserId(tokenData.getUserId());
        customer.setUpdateUserId(tokenData.getUserId());
        Date now = new Date();
        customer.setCreateTime(now);
        customer.setUpdateTime(now);
        return customer;
    }
}
